When dumping to IO, dump directly #137

Job	Run time
ruby-versions / Generate Ruby versions	2s
ubuntu-20.04 2.3	44s
ubuntu-20.04 2.4	55s
ubuntu-20.04 2.5	54s
ubuntu-20.04 2.6	56s
ubuntu-20.04 2.7	1m 12s
ubuntu-20.04 3.0	31s
ubuntu-20.04 3.1	42s
ubuntu-20.04 3.2	36s
ubuntu-20.04 head	38s
ubuntu-20.04 jruby	1m 0s
ubuntu-20.04 jruby-head	1m 6s
ubuntu-20.04 truffleruby	57s
ubuntu-20.04 truffleruby-head	52s
ubuntu-22.04 2.3	38s
ubuntu-22.04 2.4	36s
ubuntu-22.04 2.5	55s
ubuntu-22.04 2.6	48s
ubuntu-22.04 2.7	41s
ubuntu-22.04 3.0	28s
ubuntu-22.04 3.1	28s
ubuntu-22.04 3.2	43s
ubuntu-22.04 head	25s
ubuntu-22.04 jruby	1m 10s
ubuntu-22.04 jruby-head	53s
ubuntu-22.04 truffleruby	1m 10s
ubuntu-22.04 truffleruby-head	1m 7s
macos-11 2.3	1m 13s
macos-11 2.4	56s
macos-11 2.5	59s
macos-11 2.6	1m 11s
macos-11 2.7	1m 17s
macos-11 3.0	31s
macos-11 3.1	34s
macos-11 3.2	37s
macos-11 head	33s
macos-11 jruby	49s
macos-11 jruby-head	45s
macos-11 truffleruby	1m 6s
macos-11 truffleruby-head	1m 26s
macos-12 2.3	4m 39s
macos-12 2.4	3m 20s
macos-12 2.5	1m 15s
macos-12 2.6	2m 2s
macos-12 2.7	1m 29s
macos-12 3.0	46s
macos-12 3.1	48s
macos-12 3.2	41s
macos-12 head	34s
macos-12 jruby	1m 0s
macos-12 jruby-head	52s
macos-12 truffleruby	1m 27s
macos-12 truffleruby-head	2m 57s
windows-latest 2.3	1m 41s
windows-latest 2.4	2m 10s
windows-latest 2.5	3m 24s
windows-latest 2.6	2m 34s
windows-latest 2.7	2m 13s
windows-latest 3.0	1m 4s
windows-latest 3.1	1m 55s
windows-latest 3.2	3m 4s
windows-latest head	1m 48s
ubuntu-latest jruby-9.1	1m 8s
ubuntu-latest jruby-9.2	1m 6s
ubuntu-latest jruby-9.3	52s
	1h 17m 53s

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